91行C语言实现图像梯度锐化，注释详细，代码简练 for(w=1;w<width-1;w++) for(l=1;l<length-1;l++) { int result = (int)orig[w+1][l]*2-(int)orig[w-1][l]*2-(int)orig[w-1][l-1]- (int)orig[w-1][l+1]+(int)orig[w+1][l+1]+(int)orig[w+1][l-1]+ (in